JPH05504236A - A magnetic coil composed of stacked metal plates, an electric machine having a magnetic coil composed of stacked metal plates, and a method of manufacturing a magnetic coil - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] Magnetic coil made up of stacked metal plates, made up of stacked metal plates ELECTRICAL MACHINE HAVING A MAGNETIC COIL AND METHOD OF MANUFACTURING THE MAGNETIC COIL The present invention consists of substantially annular metal plates stacked one after the other in the axial direction of the coil. , each metal plate is interrupted at a part of its periphery, and adjacent metal plates are It concerns magnetic coils that are conductively connected in series with each other in the same direction as when be.

Until now, magnetic coils have mostly consisted of wire windings. winding carp In the case of coils, the space factor, i.e., the total conductor material cross-section and available for the coil. The ratio to the total cross section that can be achieved is generally at most about 60%. Magnetic by stacking metal plates By forming a coil, a fairly high space factor can be achieved and the magnetic flux changes. It has already been considered that eddy current losses can be significantly reduced when known pile In a stacked metal plate coil, the metal plate has slots at its periphery. have The slots are arranged radially in relation to the direction of the axis of the coil.

The slots are aligned with each other within the stack of metal plates. Current passes through adjacent metal plates To connect two adjacent metal plates in series in the same direction as the flow direction, Slot adjacent metal plates by making diagonal connections that bridge the level difference between must be connected to each other within the target area. This complicates manufacturing.

The object of the invention is to provide a first-mentioned method which is easier to manufacture and therefore cheaper to manufacture. The objective is to make available a wide variety of magnetic coils.

To achieve this objective, the magnetic coil of the present invention has an outer radial side facing a first circumferential edge. the inner radial side has a second tongue facing in the opposite circumferential direction; at least within the metal plate, the interrupter is located inside the stack of metal plates; When the object is constructed and progresses in the direction of the axis of the coil, the outer radius of the continuous metal plate The side and inner radial tongues are oriented alternately in the first circumferential direction and in the second circumferential direction; Proceeding in the direction of the axis of the tile, the overlapping adjacent tongues are aligned with the outer radius and the inner radius. They are characterized in that they are electrically conductively connected to each other alternately on the sides.

In the coil of the invention, the interrupter is complex in terms of the shape of the individual metal plates (but (This does not make manufacturing difficult), electrical Connections can be made in a definitively facilitated manner.

Overall, the coil is of a less complex construction with respect to the connection between the metal plates. be.

The expression "a metal plate placed inside a stack of metal plates" refers to The first metal plate of the section and the last metal plate inside the stack have tongues according to the invention. This is to point out that it is not necessarily necessary to do so. This is because one side of the blocker This is because it is necessary to connect to the adjacent metal plate only on that side. However, the effect For efficient manufacturing, the metal plates at their ends are placed inside the stack of metal plates. It is possible and even preferable to provide a tongue similar to that of the metal plate that is be.

Preferred developments of the magnetic coil according to the invention are indicated in claims 2 to 14. Regarding this Further description is given in part below and in connection with the description of the preferred embodiment. Do it partially below.

The blocker is configured as a generally S-shaped slot, and the three legs of the "S" shape are generally straight. , preferably together with each other in a rounded manner. But many other The shape is also possible, with straight slots being oblique with respect to the radial direction of the coil. is described as having a particularly simple configuration.

Technically preferred methods for obtaining adjacent tongues alternating externally and internally There is a slight possibility. In principle, adjacent tongues can be connected to soldered conductor bridges. Preferably, they are interconnected by a bridge. Connection by welding is another possibility . However, it is particularly preferable to solder between the surfaces of adjacent tongues to be connected. is a connection. This allows the necessary tongue connections of the entire stack to be made simultaneously This provides a particularly efficient possibility of being able to Another possibility is that the tongue piece is small Providing protruding metal plate lugs and adjacent tongue metal plate lugs to be connected to each other The purpose is to solder. The metal plate lugs are removed from the plane of the metal plate ring, e.g. It can also be bent at right angles to this.

Preferably, the magnetic coil is approximately rectangular when viewed in the direction of the axis of the coil ( Generally a slightly rounded corner, the blocker may be placed on one of the short sides of the rectangle. is preferable. This is a particularly favorable field of application for coils, namely electrical machinery, It is a shape that can be matched to . Therefore, the term wire-wound coil is used. In some cases, a blocker is placed in an area called the "winding head side." This is electric The long side of a rectangle usually located inside a groove in the iron part of a machine More space is usually available than is available in

In rotating electrical machines, the cross section of the groove is not rectangular but trapezoidal. be. The shape of the coil of the present invention is such that the cross section of the coil is at least two corresponding circumferences. It can be matched very easily by making the sides approximately trapezoidal. . This can be done by stacking metal plates of various shapes. but , the entire coil stack must be machined to achieve the desired cross-sectional shape. is much more efficient. The cross section of the coil that varies along the axis of the coil must be Although it is not necessary to do so, it is necessary to form it on the "winding head side". can.

When a coil having the trapezoidal cross section is used, one metal plate covers the coil. individually depending on whether it is closer to one axis end or another of it. There is a problem in that the width of the metal plates and therefore their electrical resistance values are different.

However, when there should be approximately the same current density in all metal plates during operation, This is advantageous, since the other two sides of the rectangle, i.e. the "winding head side", At least one of a metal plate with different thickness and a metal plate with different width is provided. This can be compensated for by Compensation for reducing the width of the metal plate is necessary at this point. There isn't. For example, if metal plates with the same metal thickness are placed in groups, It is possible to vary the thickness from group to group. metal plate on two other sides of a rectangle When compensation is made in the form of increasing the width of the rectangle, this of course Without changing the electrical resistance values of the two sides, the electrical resistance of the entire related annular metal plate remains unchanged. Certain compensation is made in relation to the resistance value.

Overall, it is effective to widen the overall width of the part of the metal plate where the tongue pieces are formed. advantageous and preferable. This is because only a portion of the total width of the metal plate is (However, even then, the overlap The resistance value increases when adjacent tongues are connected across their front surfaces. ).

-Formation of grooves for flowing cooling fluid and metal plate stack, which will be explained in detail later. at least one of forming a groove for holding the members together; It is preferable to place the opening in the metal plate on the “winding head side” of the coil. .

Preferably, the coil is provided as a compact coil block. for that After making the electrical connections between the tongues to be connected, place the entire metal plate stack in a suitable Can be immersed into a plastic material or a suitable plastic material into it Can be attached. The plastic material can then be used to supply heat, for example. It can be hardened. Therefore, perhaps by said post-machining The exposed edges of the metal plate are covered again in an insulating manner.

In order to produce the coil in the most efficient manner possible, the least possible post-machine At least before the processing operation, the metal plates have approximately the same shape as each other when viewed in plan. The metal plate can be formed by stamped parts or etching Alternate the metal plates in the metal plate stack to align the parts and tongues. 80' for positioning.

Furthermore, the subject of the invention comprises a stator and a rotor, the rotor or the stator having an electromagnetic magnet. Electrical machines, in particular rotary motors, which are provided with poles and permanent magnets in other parts, Forming electromagnetic poles in rotary generators, linear motors or linear generators In order to achieve this, an electric current is provided, in which a magnetic coil of the type described above is provided on an iron core. It's a mechanical machine. The magnetic coil of the invention is completely prefabricated as separate parts and the whole It is very suitable for slipping the core of the coil. Machine electromagnet magnetic pole requirements It is pointed out that each one need not necessarily be an electromagnetic pole with a coil.

Apart from the magnetic coil employed, the electric machine of the invention is equipped with a high coercivity electromagnet. an electronically rectified machine supplied with direct current and a flow collector. Preferably, at least one machine has a structure according to the middle principle. Protection Permanent magnetic materials with high magnetic strength are especially those based on one or several rare earth elements. materials based on materials, especially samarium, cobalt, and iron-neodymium. . Suitable machines that follow the flow concentration principle are When the permanent magnets are magnetized, the magnetic flux between the permanent magnets is rotated by a piece of material that allows the magnetic flux to pass through. It is configured to be increased relative to the air gap.

The magnetic coil of the present invention has sufficiently smooth inner and outer contours (particularly circular shape outline, or a square with rounded corners, or a length with rounded corners square), from which the tongue does not protrude medially or outwardly.

Finally, the subject matter of the invention is as defined in claims 16 to 19. It is to manufacture different kinds of magnetic coils.

According to the first manufacturing method, an insulating coating is applied to at least one side of each metal plate. The metal plate is made of plate-like material that is not coated (or insulated on at least one side). ), then a metal plate stack is formed from several metal plates, and finally The tongue connections are made at the same time, preferably by soldering. In this connection, tongue fragments If tin is pre-deposited where the connections are to be soldered together, it is It is advantageous in this regard. Of course, the tongue part to be soldered together is coated with insulation. It is also possible to cover those parts before applying the insulating coating to avoid damage.

According to a second preferred method, the metal plate stack is first formed from non-insulated metal plates; The tongue connection is then made, preferably by soldering, and then the adjacent metal Insert insulation between metal plates. By pulling the metal plate apart like a bellows, you can Edge insertion is facilitated.

For example, electrophoretic hexamer deposition is suitable for depositing or inserting insulation.

Rather than immersing it in a solder bath, heat the tongue to which tin has been pre-attached. Therefore, soldering is performed most appropriately.

Before or after tongue connections and before or after inserting insulation between adjacent metal plates. Later, the outer radial side of the metal plate stack and the At least one of the internal radial sides can be post-machined. The mechanical processing During the machining process, the trapezoidal cross section can be produced as well.

electrically connected and possibly post-machined as outlined above. The metal sheet stack is fired and compacted with a suitable material, e.g. impregnated varnish. It is preferable to form a coil block. Holding metal plate stacks together The stack is made of non-conductive material and can be placed in the corresponding groove for A holding element can already be placed therein. Impregnated material, does not form a coating film It is also possible to use a plastic material that hardens as it fills the volume. can. 2, the retaining members that hold the stack together are used at the same time as the impregnation process. can be formed into However, in the latter case, the possible cooling fluid grooves Filled with a core that is later removed to avoid being filled with plastic material There must be. Through impregnation treatment, insulation between metal plates can be formed at the same time. can.

Of course, the term "circular metal plate" does not mean "circular metal plate". Point out that. The term "annular" means - the circumference of a metal plate, excluding each interrupter. It simply indicates that it has a shape that is closed in the direction.

The invention and its development will be explained below by means of an example schematically illustrated in the drawings. explain in detail.

Figure 1 shows the metal of a magnetic coil offset from each other (with another corresponding metal plate) 1 shows a perspective view of several metal plates forming a stack of plates; FIG.

Figure 2a shows the assembly of the metal plates of Figure 1 viewed radially inward according to arrow 2a of Figure 1. A diagram of the stack is shown.

Figure 2b shows the assembly of the metal plates of Figure 1 viewed radially outwards according to arrow 2b of Figure 1. A diagram of the stack is shown.

FIG. 3 shows a section of a rotating electric motor with magnetic coils shown above the stator; Figure 3 shows a cross section perpendicular to the axis of rotation.

The metal plate 2 shown in FIG. 1 is a substantially rectangular metal plate ring having mutually similar shapes. Indicates the They are manufactured by stamping. On the two long sides 4 of the rectangle, a metal plate The width 6 of is narrower than the width of the two short sides 8 of the rectangle.

On the short side 8 of the upper rectangle in FIG. has. The slot is continuous from the radially outer side 12 to the radially inner side 14. . The metal plate ring 2 is thereby interrupted at the corresponding location.

Across the length of the central leg of the "S" shape 10, the upper short side 8 of each metal plate 2 is It has two tongues 16,17. Each tongue is approximately half the width of the entire metal plate there occupies

All metal plates 2 have the same shape. However, the bottom surface of the other metal plate 2 is facing up. Thus, every other metal plate 2 is rotated by 180@. Therefore, radially out The side tongue pieces 16 and the radially inner tongue pieces 17 overlap on adjacent metal plates 2. cormorant. In the metal plate 2 furthest apart in FIG. 1, the radially outer tongue 17 is The radially inner tongue 16 is oriented to the right in FIG.

In the next adjacent metal plate towards the front in FIG. 1, the radially inner tongue 16 is The radially outer tongues 17 are oriented to the right in FIG. 1 and the radially outer tongues 17 are oriented to the left in FIG.

The rearmost metal plate 2 in Figure 1 is formed by stacking a large number of metal plates 2. It is assumed that the bottom metal plate of the metal plate stack 20 is metal plate 2 and further By sliding the corresponding metal plates 2 together along the coil axis 22 in FIG. The rearmost metal plate (bottom in Figures 2a and 2b) is A current source 24 is provided on the radially inner tongue piece 17, and a current source 24 is provided on the radially inner tongue piece 17. The outer tongue 16 has its lowermost solder as shown schematically in Figure 2b. A connection must be made by means of a connection to the radially outer tongue of the adjacent metal plate 2. under between the second and third metal plates, as shown in Figure 2b. between the radially inner tongues 17 of the bottom solder joint 26, Conductive connections shall be made. This tongue connection method extends throughout the stack 20. I can keep going. To complete the stack 20, the front of FIG. 1 and FIG. 2a and FIG. Another metal plate added on top of 2b must be considered. everything like this The metal plates are conductively connected in series to each other in the same direction as the current flow. Also, In the metal plate 2 at the rearmost position in Fig. 1 and at the bottom in Figs. 2a and 2b, It can also be seen that the side tongues 17 can actually be dispensed with. slot 10 It is important that the current is supplied to the opposite side of the radially outer tongue 16 on the other side. Only.

The metal plate 2 shown in FIG. 1 has a first opening 28 on the short side 8 of the rectangle. Ru. Their openings are relatively narrow, elongated, and have partial 90° bends.

The metal plate 2 shown in FIG. 1 also has three second openings 30. those openings The section is also provided entirely on the short side 8 of the rectangle. When metal plates 2 are stacked , the first opening 28 and the second opening 30 of the metal plate 2 are aligned with each other.

The groove formed in the stack 20 by the first opening 28 may be, for example, a non-conductive grooves into which material is placed to hold the stack together.

The magnetic coil 32 is formed by said electrical connection of the metal plates 2 of the stack 20. Ru.

FIG. 3 shows a schematic cross-sectional view of the electric motor 34. As shown in FIG. This electric motor 34 has a substantially drum-shaped internal structure. It has a stator 36 and a generally annular outer rotor 38 surrounding the stator 36. in advance The assembled embodiment of the magnetic coil 32 is externally shown in FIG. It is fitted from above the central stator tooth 40 of the child 36. This electric motor 34 is relatively small. Therefore, the groove between adjacent stator teeth is trapezoidal in the cross-sectional view of FIG. The bottom is radially outward. The magnetic coil 32 has a small length (both long sides 4 are Two teeth are arranged on the left and right sides of the central stator tooth 40 and extend in the axial direction of the electric motor 34. The inside and outside of the long sides 4 are milled so as to fit into the grooves.

As can be seen in sequence in the circumferential direction, permanent magnets 44 and flow guiding members 46 are attached to rotor 38. Take turns on top. The permanent magnet 44 is magnetized with the direction of magnetization alternated in the circumferential direction. , after each flow guiding member 46 there are two permanent magnet south poles or two permanent magnet south poles. The stone north pole continues. Magnetic flux density at the cross-section 48 of the magnetic flux outlet of each flow guiding member 46 of each permanent magnet is oriented in the circumferential direction such that the , the cross-section of the magnetic flux is significantly larger than the radially inner half of the magnetic flux.

Wealth th Shutaudo small version of the 6th round middle child r guweijintan 1 only 4 winter 8) Required Specification Magnetic coil made up of stacked metal plates, made up of stacked metal plates ELECTRICAL MACHINE HAVING A MAGNETIC COIL AND METHOD OF MANUFACTURING THE MAGNETIC COIL The present invention consists of substantially annular metal plates stacked one after the other in the axial direction of the coil. , relates to a magnetic coil having the following characteristics.

(a) each metal plate is interrupted at a part of its periphery; (b) Adjacent metal plates are connected in series with each other in the same direction as the current flow; (C) at least within the metal plate disposed within the stack of metal plates; The radially outer side has a first circumferentially facing tongue and the radially inner side has a second opposite tongue. having tongues facing circumferentially; (d) - both radially outer and radially inner tongues proceeding in the axial direction of the coil; are oriented alternately in the first circumferential direction and the second circumferential direction; (e) - Proceeding in the axial direction of the coil - adjacent tongues that differ are radially outward. and are connected to each other alternately radially inward.

Until now, magnetic coils have mostly consisted of wire windings. winding carp In the case of coils, the space factor, i.e., the total conductor material cross-section and available for the coil. The ratio to the total cross section that can be achieved is generally at most about 60%. Magnetic by stacking metal plates By forming a coil, a fairly high space factor can be achieved and the magnetic flux changes. It has already been considered that eddy current losses can be significantly reduced when

The document French Patent Application No. 600 511 describes a magnetic coil of the kind described above. is disclosed. In this magnetic coil, it is provided on the outside in the radial direction. The tongue protrudes outward beyond the outer peripheral contour of the magnetic coil and is provided radially inward. The tongues protrude inwardly beyond the inner peripheral contour of the magnetic coil.

In comparison, the magnetic coil of the present invention has tongues that are smooth enough on the inside and outside. It is characterized by being placed inside the contour of a magnetic coil.

In the magnetic coil of the present invention, the tongue piece has a sufficiently smooth magnetic field across the inside and outside. Coil contours do not protrude inward or outward. The contour of the magnetic coil is circular, rounded A square with perhaps rounded corners, or a long one with perhaps rounded corners. Preferably, it is square.

Stacked metal plates each having a radially extending slot at the periphery Compared to magnetic coils composed of rings, the interrupters in the coil of the present invention are The shape of the metal plate is complex (but this does not make it difficult to manufacture) , making it possible to make electrical connections between metal plates in a decisively facilitated manner. I can do it. Overall, the structure of the coil does not offer much in terms of connections between the metal plates. It is less complex and easier to manufacture and therefore can be manufactured at lower cost.

The expression "a metal plate placed inside a stack of metal plates" refers to The first metal plate of the section and the last metal plate inside the stack have tongues according to the invention. This is to point out that it is not necessarily necessary to do so. This is because one side of the blocker This is because it is necessary to connect to the adjacent metal plate only on that side. However, the effect For efficient manufacturing, the metal plates at their ends are placed inside the stack of metal plates. It is possible and even preferable to provide a tongue similar to that of the metal plate that is be.

Preferred developments of the magnetic coil according to the invention are indicated in claims 1-4. Regarding this Further description is given in part below and in connection with the description of the preferred embodiment. Do it partially below.

The blocker is configured as a generally S-shaped slot, and the three legs of the "S" shape are generally straight. , preferably together with each other in a rounded manner. But many other The shape is also possible, with straight slots being oblique with respect to the radial direction of the moyle. is described as having a particularly simple configuration.

Technically preferred methods for obtaining adjacent tongues alternating externally and internally There is a slight possibility. In principle, adjacent tongues can be connected to soldered conductor bridges. Preferably, they are interconnected by a bridge. Connection by welding is another possibility . However, it is preferable to solder between the surfaces of the adjacent tongues to be connected. It's a connection.

This allows the necessary tongue connections of the entire stack to be made at the same time. This offers particularly efficient possibilities.

The magnetic coil of the invention is completely prefabricated as separate parts and the coil as a whole Very suitable for sliding cores. Each one of the electromagnet magnetic poles of the machine must be It is pointed out that it does not have to be an electromagnet pole with a coil.

Apart from the magnetic coil employed, the electric machine of the invention is equipped with a high coercivity electromagnet. an electronically rectified machine supplied with direct current and a flow collector. Preferably, at least one machine has a structure according to the middle principle. Protection Permanent magnetic materials with high magnetic strength are especially those based on one or several rare earth elements. materials based on materials, especially samarium, cobalt, and iron-neodymium. . Suitable machines that follow the flow concentration principle are When the permanent magnets are magnetized, the magnetic flux between the permanent magnets is rotated by a piece of material that allows the magnetic flux to pass through. It is configured to be increased relative to the air gap.

The scope of the claims 1. Almost annular metal plates (2) stacked sequentially in the axial direction of the coil (22). A magnetic coil (32) configured and having the following characteristics: (a) each metal plate (2) is interrupted at a part of its periphery; (b) Adjacent metal plates (2) are connected in series with each other in the same direction as the current flow direction. Re; (C) at least one of the metal plates arranged in the stack (20) of metal plates (2); The interior has a radially outer tongue facing the first circumferential direction and a radially inner tongue. The barrier (10) is configured such that the side has a second opposite circumferentially facing tongue. : (d) - Proceeding in the axial direction (22) of the coil, both the radially outer and radially inner the tongue pieces (16, 17) of the two sides are oriented alternately in the first circumferential direction and the second circumferential direction; (e) - Adjacent tongue pieces (16, 17) are connected to each other alternately radially outwardly and radially inwardly.

Consists of approximately annular metal plates (2) stacked sequentially in the axial direction of the coil (22) In the magnetic coil (32), which has the following characteristics, The tongues (16, 17) are sufficiently smooth and have magnetic coils ( 32) A magnetic coil characterized in that it is arranged within the contour of.

2. In the magnetic coil according to claim 1, the interrupter has a substantially S-shaped slot (10 ) A magnetic coil characterized by being configured in the form of

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Claims (1)

[Claims] 1. It consists of approximately annular metal plates (2) stacked one after another in the axial direction of the coil. , each metal plate (2) is cut off at a part of its periphery, and the adjacent metal plate (2) is Magnetic coils ( 32), the outer radial side has a tongue piece (16) facing in the first circumferential direction; At least the gold plate has a second opposite circumferentially directed tongue (17) on the radial side. A barrier located inside the stack of metal plates (20) in the metal plate (2) (10) is formed and proceeding in the direction of the axis (22) of the coil, a continuous gold The tongue pieces (16, 17) on the outer radial side and the inner radial side of the metal plate (2) are aligned in the first circumferential direction. oriented alternately in the direction of the second circumferential edge and proceeding in the direction of the axis (22) of the coil, the overlapping Adjacent tongue pieces (16, 17) that touch each other alternately on the outer radius side and the inner radius side. A magnetic coil characterized in that it is electrically conductively connected. 2. A magnetic coil according to claim 1, wherein the blocker comprises a generally S-shaped slot (10). A magnetic coil characterized by being configured in the form of. 3. In the magnetic coil according to claim 1 or 2, the tongue pieces (16, 17) are welded. A magnetic coil characterized by being interconnected. 4. In the magnetic coil according to claim 1 or 2, the tongue pieces (16, 17) are soldered. A magnetic coil characterized in that the coils are connected by a screw. 5. The magnetic coil according to any one of claims 1 to 4, wherein the axis of the coil ( 22), the magnetic coil is approximately rectangular, and the blocker (10) is rectangular. A magnetic coil, characterized in that it is arranged on one of the short sides (8) of the magnetic coil. 6. The magnetic coil according to any one of claims 1 to 5, wherein the axis of the coil ( 22) The magnetic coil is approximately rectangular when viewed in the direction of The cross section of the coil should be approximately trapezoidal on at least two sides (4) of the rectangle. A magnetic coil featuring: 7. The magnetic coil according to claim 6, wherein the metal plate is narrowed due to its trapezoidal shape. the other two sides (8) of the rectangle to at least partially compensate for the width (6) A metal plate (2) having at least one of various metal plate thicknesses and various metal plate widths is installed in the A magnetic coil that is characterized by being eclipsed. 8. The magnetic coil according to any one of claims 1 to 7, wherein the width of the metal plate (8 ) is expanded at the portion where the tongue pieces (16, 17) are formed. Qi coil. 9. The magnetic coil according to any one of claims 1 to 8, wherein the metal plate (2) a first opening (28) in the stack of metal plates (20); The metal is substantially aligned with each other and within the second passageway so formed. Specially, a non-conductive retaining member is provided for holding the stack of plates together. Magnetic coil. 10. The magnetic coil according to any one of claims 1 to 9, wherein the metal plate (2) has a second opening (30) which opens the stack (20) of metal plates. and the second passageway so formed is substantially aligned with one another, and the gold Non-conductive retaining members shall be provided to hold the stack of metal plates together. Features a magnetic coil. 11. The magnetic coil according to any one of claims 1 to 10, comprising: A magnetic coil characterized in that it is impregnated with an insulating and impregnating substance. 12. The magnetic coil according to any one of claims 1 to 11, wherein the metal plate (2 ) is a magnetic coil characterized by being punched out. 13. The magnetic coil according to any one of claims 1 to 12, wherein the metal plate (2 ) are approximately close to each other when viewed in plan, at least before possible post-machining. Magnetic coils characterized by having the same shape. 14. In the magnetic coil according to any one of claims 1 to 13, the tongue pieces are aligned. In order to A magnetic coil characterized in that it is arranged in a manner that 15. It is equipped with a stator (36) and a rotor (38), and an electromagnet is attached to the rotor or stator. An electric machine (3) provided with poles (40) and other parts with permanent magnets (48) 4), especially in rotary motors, rotary generators, linear motors or linear generators. according to any one of claims 1 to 14, for forming an electromagnet pole (40). The magnetic coil (32) is provided on the iron core (40). machine. 16. At least one side of the metal plate (2), excluding the tongue portion to be connected An insulating coating is applied to the surface to form a stack of metal plates (20), and a tongue connection part (26) is formed. are simultaneously formed by soldering. A method of manufacturing a magnetic coil (32) according to. 17. A method for manufacturing the magnetic coil (32) according to any one of claims 1 to 14. In the method, a stack (20) is formed from metal plates (2) and soldered by soldering. Simultaneously form the solder joints (26) and insert insulation between adjacent metal plates (2) A method characterized by: 18. The method according to claim 16 or 17, wherein the outer radial side and the inner radial side are at least on one side to the electrically connected stack (20) of metal plates; A method characterized by performing machining with. 19. A method according to any one of claims 16 to 18, in which the electrical impregnating the stack (20) connected to and later machined with an impregnating substance; A method characterized by firing by heating to form a coil block from .